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Home >> Infiniti >> 2004 >> M45 >> Repair and Diagnosis >> Engine Performance >> Engine Control System >> DTC P1220: Fuel Pump Control Module (FPCM) >> Diagnostic Procedure >> 9. Check FPCM Output Signal Circuit For Open And Short
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9. Check FPCM Output Signal Circuit For Open And Short

  1. Check harness continuity between ECM terminal 25 and FPCM terminal 1. Refer to WIRING DIAGRAM .

    Continuity should exist. 

  2. Also check harness for short to ground and short to power.

OK or NG 

  1. OK: GO TO 11. CHECK FPCM .
  2. NG: GO TO 10.